drying out

I have a microgrow. Literally 60cm (2ft) tall and deep and 40cm (just over 1 ft) wide. I have a problem with the grows I have done in it. The leaves have browned off, to the point where even the sugar leaves were a dry mess. The smoke was pretty good regardless, but eh. I have had a few...

ive got 4 seeds started in rapid rooters, they are doing well and have leaves starting but the roots are still really small (smaller then they should be and only one large root) also my rapid rooters keep drying out. Every 2 hours I have to add water to them. They are under 1 small led light...